i.e. If we were moving at the same velocity of the Nebula looking with our own eyes.
i.e. What it would look like "in real life if I actually went there"
But that's with a telescope and long exposure & image stacking. But still in RGB as humans would see it.
I guess there would be a point that if you were not so far away, but still far enough away - it would light up the sky. This is emission nebula after all.
BUt if you were in it, it would be so diffuse that you wouldn't know it... perhaps a weird glow if you were near some of the forming stars.